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3. I'd set up merchant services, so merchants could accept payments in cryptocurrency, bypassing VISA. I'd make sure my fees were lower than VISA's to encourage take up. I'd contact all my existing business customers to alert them to this new service.
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The current process (which inclueds VISA) has 4 members (2 middlemen).
The payment system is the following:
Customer with debit card -> VISA -> Bank -> Merchant
You say that if you start to use crypto, it will be like this (cheaper, because VISA is off):
Customer with bank's mobile wallet -> Bank's wallet -> Merchant
If you were the Merchant, would you prefer the following?
Customer with mobile wallet -> Merchant wallet
Because this is possible with crypto also, so you don't need the Bank at all, you can cut out 2 middlemen and you can reduce the prices (or gain more profit), because the fees of the middlemen are not applying.
Maybe this is why banks are not happy with crypto